Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Revenue:
Products	$ 75,864	$ 34,136
Revenue, Product and Service [Extensible List]	Product	Product
Rental equipment	$ 19,000	$ 53,699
Total revenue	94,864	87,835
Cost of revenue:
Products	$ 58,884	$ 39,970
Revenue, Product and Service [Extensible List]	Product	Product
Rental equipment	$ 19,686	$ 24,433
Total cost of revenue	78,570	64,403
Gross profit	16,294	23,432
Operating expenses:
Selling, general and administrative	21,926	23,068
Research and development	14,839	16,569
Goodwill impairment		671
Change in estimated fair value of contingent consideration	(3,524)	1,100
Bad debt expense (recovery)	(76)	63
Total operating expenses	33,165	41,471
Loss from operations	(16,871)	(18,039)
Other income (expense):
Interest expense		(38)
Interest income	1,441	1,102
Gain on investments, net	1,993
Foreign exchange gains (losses), net	(41)	491
Other, net		(109)
Total other income, net	3,393	1,446
Loss before income taxes	(13,478)	(16,593)
Income tax expense	578	2,649
Net loss	$ (14,056)	$ (19,242)
Loss per common share:
Basic	$ (1.05)	$ (1.42)
Diluted	$ (1.05)	$ (1.42)
Weighted average common shares outstanding:
Basic	13,358,930	13,525,179
Diluted	13,358,930	13,525,179